In this paper, different forms of fibers can be obtained by adjusting the rotating speed of the collecting cylinder. This is due to the centripetal force generated by the collecting cylinder when the precursor colloid is on the collecting drum, which makes the diameter of nanofibers change significantly, thus forming different nanofibers and nanobelts. The average diameter of nanofibers increased from 0.09μm to 0.79μm, and finally decreased to 0.17μm. The results show that the morphology of nanofibers also has a significant effect on the magnetic properties of the materials, which is due to the interaction of domain rotation and fiber crystallization. The coercivity of nanoribbons is 1145.39 Oe. The research in this field is of great significance to the industrial production of nanofibers and the morphology and application of nanofibers. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.